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Fix bugs 

llvm-svn: 3569
This commit is contained in:
Chris Lattner 2002-09-02 20:49:27 +00:00
parent 99f48c614d
commit 5d2bce8555
2 changed files with 42 additions and 28 deletions
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35
llvm/lib/Support/ConstantRange.cpp
View File

@ -142,10 +142,6 @@ static ConstantRange intersect1Wrapped(const ConstantRange &LHS,
const ConstantRange &RHS) {
assert(LHS.isWrappedSet() && !RHS.isWrappedSet());
// Handle common special cases
if (RHS.isEmptySet()) return RHS;
if (RHS.isFullSet()) return LHS;
// Check to see if we overlap on the Left side of RHS...
//
if ((*(Constant*)RHS.getLower() < *(Constant*)LHS.getUpper())->getValue()) {
@ -178,21 +174,34 @@ static ConstantRange intersect1Wrapped(const ConstantRange &LHS,
}
}
static ConstantIntegral *Min(ConstantIntegral *A, ConstantIntegral *B) {
if ((*(Constant*)A < *(Constant*)B)->getValue())
return A;
return B;
}
static ConstantIntegral *Max(ConstantIntegral *A, ConstantIntegral *B) {
if ((*(Constant*)A > *(Constant*)B)->getValue())
return A;
return B;
}
/// intersect - Return the range that results from the intersection of this
/// range with another range.
///
ConstantRange ConstantRange::intersectWith(const ConstantRange &CR) const {
assert(getType() == CR.getType() && "ConstantRange types don't agree!");
// Handle common special cases
if (isEmptySet() || CR.isFullSet()) return *this;
if (isFullSet() || CR.isEmptySet()) return CR;
if (!isWrappedSet()) {
if (!CR.isWrappedSet()) {
const Constant &L = std::max(*(Constant*)Lower, *(Constant*)CR.Lower);
const Constant &U = std::min(*(Constant*)Upper, *(Constant*)CR.Upper);
ConstantIntegral *L = Max(Lower, CR.Lower);
ConstantIntegral *U = Min(Upper, CR.Upper);
if ((L < U)->getValue()) // If range isn't empty...
return ConstantRange(cast<ConstantIntegral>((Constant*)&L),
cast<ConstantIntegral>((Constant*)&U));
if ((*L < *U)->getValue()) // If range isn't empty...
return ConstantRange(L, U);
else
return ConstantRange(getType(), false); // Otherwise, return empty set
} else
@ -202,11 +211,9 @@ ConstantRange ConstantRange::intersectWith(const ConstantRange &CR) const {
return intersect1Wrapped(*this, CR);
else {
// Both ranges are wrapped...
const Constant &L = std::max(*(Constant*)Lower, *(Constant*)CR.Lower);
const Constant &U = std::min(*(Constant*)Upper, *(Constant*)CR.Upper);
return ConstantRange(cast<ConstantIntegral>((Constant*)&L),
cast<ConstantIntegral>((Constant*)&U));
ConstantIntegral *L = Max(Lower, CR.Lower);
ConstantIntegral *U = Min(Upper, CR.Upper);
return ConstantRange(L, U);
}
}
return *this;

35
llvm/support/lib/Support/ConstantRange.cpp
View File

@ -142,10 +142,6 @@ static ConstantRange intersect1Wrapped(const ConstantRange &LHS,
const ConstantRange &RHS) {
assert(LHS.isWrappedSet() && !RHS.isWrappedSet());
// Handle common special cases
if (RHS.isEmptySet()) return RHS;
if (RHS.isFullSet()) return LHS;
// Check to see if we overlap on the Left side of RHS...
//
if ((*(Constant*)RHS.getLower() < *(Constant*)LHS.getUpper())->getValue()) {
@ -178,21 +174,34 @@ static ConstantRange intersect1Wrapped(const ConstantRange &LHS,
}
}
static ConstantIntegral *Min(ConstantIntegral *A, ConstantIntegral *B) {
if ((*(Constant*)A < *(Constant*)B)->getValue())
return A;
return B;
}
static ConstantIntegral *Max(ConstantIntegral *A, ConstantIntegral *B) {
if ((*(Constant*)A > *(Constant*)B)->getValue())
return A;
return B;
}
/// intersect - Return the range that results from the intersection of this
/// range with another range.
///
ConstantRange ConstantRange::intersectWith(const ConstantRange &CR) const {
assert(getType() == CR.getType() && "ConstantRange types don't agree!");
// Handle common special cases
if (isEmptySet() || CR.isFullSet()) return *this;
if (isFullSet() || CR.isEmptySet()) return CR;
if (!isWrappedSet()) {
if (!CR.isWrappedSet()) {
const Constant &L = std::max(*(Constant*)Lower, *(Constant*)CR.Lower);
const Constant &U = std::min(*(Constant*)Upper, *(Constant*)CR.Upper);
ConstantIntegral *L = Max(Lower, CR.Lower);
ConstantIntegral *U = Min(Upper, CR.Upper);
if ((L < U)->getValue()) // If range isn't empty...
return ConstantRange(cast<ConstantIntegral>((Constant*)&L),
cast<ConstantIntegral>((Constant*)&U));
if ((*L < *U)->getValue()) // If range isn't empty...
return ConstantRange(L, U);
else
return ConstantRange(getType(), false); // Otherwise, return empty set
} else
@ -202,11 +211,9 @@ ConstantRange ConstantRange::intersectWith(const ConstantRange &CR) const {
return intersect1Wrapped(*this, CR);
else {
// Both ranges are wrapped...
const Constant &L = std::max(*(Constant*)Lower, *(Constant*)CR.Lower);
const Constant &U = std::min(*(Constant*)Upper, *(Constant*)CR.Upper);
return ConstantRange(cast<ConstantIntegral>((Constant*)&L),
cast<ConstantIntegral>((Constant*)&U));
ConstantIntegral *L = Max(Lower, CR.Lower);
ConstantIntegral *U = Min(Upper, CR.Upper);
return ConstantRange(L, U);
}
}
return *this;